We liked the separate number pad, nice size keys, the auto scrolling on the right side of the touch pad (although it did tend to be a bit over sensitive and it kicked times in when you weren't consciously intending to use the feature), the screen display itself was very crisp and sharp. It was our first computer with an AMD processor which did seem to compare well with what we had experienced of pentium processors , possibly it seemed it was even a little less prone to locking up (particularly with image based processes - the AMD was using their what they call Vision enhancement basic version) which every pentium based PC we have had did at some stage.
But the C650-15J we had developed an horizontal green line on the screen just under where the 2 upper lid knobs are after only 3 weeks. Researching the defect forum sites revealed such lines seemed to have developed in other Toshiba laptops although not being limited to just that make. This started us questioning the rigidity of the screen casing which did seem less solid compared to some other makes and maybe we wondered was a contributing factor to the fault that had developed (dialogue about the problem with Toshiba neither confirmed nor denied that).
Another immediate useage problem was that the laptop would not recognize our usb plug-in external hard drive or boot up from CD's or DVD's that were Linux based (the platform used for a lot of PC disk recovery situations software). Searching again internet forums we found the BIOS version (v.1.4) on the laptop we had bought in Sept 2010 was found to have defects which were resolved around Nov 2010 and a new BIOS with corrections was available (v.1.6) from the Toshiba site for download then update. Toshiba themselves though did not tell us about this but after downloading then installing the updated BIOS the external hard drive and Linux disks then worked as they should have done on the laptop.
So if you have a Toshiba laptop supplied with the old BIOS and your external hard drive doesn't seem to work with it or it won't boot some start-up disks, don't go out buying a new hard drive thinking it is that which is the problem, go to the Toshiba site and download the new corrected BIOS.
Some other negative points came about when using the laptop in that the disk drive drawer is very close to the power supply plug-in point, so the drawer tended to get caught opening and closing it.
This Toshiba also didn't come with hmdi connection and only had 2 usb points which seems less than can be found in other makes in the same price range (many also including a built in webcam too).
As a last minor point I would also mention that when writing the recovery media disks an error came about writing the first disk. The messages about dealing with the error and how to proceed were less than clear as indeed was the little they say in the instruction manual booklet about this particular process.
The recovery media situation is also in my opinion somewhat deficient particularly in the fact you are not supplied with disks for the operating system itself which is something I would encourage people to complain to both the retailers and manufacturers about.